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ESchedule referred to in these Lettera-Patent and part of the' same. I

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Rensselaer, in the State ot'New York, have invented certain new and useful Improvements in Stop-Valves; vand I do hereby declare thatthe following isa fnli, clear, `and exact beinghad to the annexed drawing and vletters of reference marked tiereon, forming a part ot' this 'spe'ciiication.

The object of this invention is to provide new and; useful 'improvements i-n stop-valves for water, steam, gas, and other pipes.`

The n'rst p'art ot`my invention relates to a peculiar form of valve-oase, by which is secured a great reduction'o'f material, together with great strength to resist theeaetion oi" heavy water-pressure.

The second partv of my invention relates to the construction of the sliding gates'so as to render them reversible, .in the manner-diereinafter described.

' The third part vof my invention relates to themanner ot' locking the gates to the arms, by which they are suspended` l The fourth-'part of my invention relates Vto the coustruetion of ribs on the inner sides of the gates, with corresponding parallel ribs in the valve-case, on which fthe gates are 'to slide, to obviate the vibrating motion given tothe gate when allowed to slide on its periph-- ery when Athe valve' is placed in a horizontal position.- v

' he fifth part of myvinvention relates to the manner of operating the central cam-block.

, This is domi-- i First, by means ofa pendent lever attached to said camb1ock,.and coming in contact with a cam or inclined surface at the bottom of the valve-case; or

Second, by a sliding rod or stilt suspended on the inner side of the gate, which, coming in contact with a stop at the bottom of the valve-case, presses up the lever projecting-'from the cam-block.

lhe sixth part of my invention relates-to the con- ,struction of-l-an adjustable fulcrum-stop, by which to compensate for the wear of the valveffa'ces by screwing down the set-nuts, and also for relieving the frietion of thevalve-faces, when opening the valve, by means oi' a ycam with hand-level' 'attached thereto, and by' turning said hand-leveriu the right direction the adjustable stop is lowered, thus releasing the camblock"lever.

llo-enable others skilled inthe art to make andiise the same, Inow proceed to fully describe the construet-ion and. operation ofthe same. Figure l represents an elevation of' my improved 'stop-valve, partly sectioned.) .Figure 2 represents a longitudinal sectional eleva- .tionfethe same.

description of the same, reference passes upward, is gradually changed from ontoV the stem' n.

' into it in such a manner that,wheu the of the gates. l

Figure 6 represents a view of the cani-block or oscillatiugl block. A. A represent pipe-connections of valve-case, coni str-noted in the ordinary manner.

B 13,-the valve-chamber, into which the gates' O C',

pass when the valve is opened.

' The lower part of thisA chamber or valve-box, as it a square, into a circle by having its four sides 'l2 '.b'cinvfetr outwardly, and so corresponds to the circle -of the dome.

shaped cover.

The gates C G are'suspended by a nut, on, screwed A straight sliding stem may be nsedin its stead. i-

Thc faces of said gates C G are truly iit'ted; so also are the seats D D, vover which they slide.

",ih'e gates O C are attached by arms or trnnnons O projecting oppositely from the nut m and entering cylindrical sockets P I on the upper and inner portion of the gates C C.

Similar sockets l) P are formed directly opposite, on the 'lower and inner portion of the gates C C, forf the purpose oi' reversing the gate C or gates C C when the lower or working face becomes scratched or bruised. y

The arms O O are provided with a groove, Q,

around andnear their-outer ends, and also a'slot, lt, from the groove Q to the extremity of the arm, and each socket l? P is furnished with a pin, S, projecting arm O is insertedfinto said socket atright angles to its trueposition, `this pin passes thronghl' the slot lt into the v groove Q, and then, when the arm O is turned up to its true position, the gate is lsecurely locke' lhe groove Q is made wider than the pin S to allow thc gates to expand freely.

l0nthebackof each gate G C are .two ribs CET, and also in the valve-cas. are corresponding ribs U U, upultavllieh thcffgates .C C slide freely.

when thegates are closed they are firmly pressed to-the seatsI'D D bymcans `of the oscillating block/E, withright-and-lcft hand screw-faces or circnlariuelines 11 F .operating against corresponding right-and-left gate Ci' f l A l Said oscillating block llis oscillated by means of handserewitoes.or inclines j f on the back'of leach- =pelnlent levei'fG, attached thereto, comin g in contact with'the cain or incline surface H at the bottolndf the valveeas`e. in theV downward movement of tle gates C C; er, it may bc oscillated by a sliding rod,

upward.

A XV, sn'spencled'lon the inner side"of' tl1e gte ),snrl

rod being pressed on `che bottom of the fvrlr'e-czlse and thus forcing the short *projecting :mn or lever V Suid oscillating block meynlso be operated by lpenns of n f'ulcrum-lever, l', attaehed thereto, being nreted in its downward movement on an adjustable fnlcrm'- stop, k.

This adjustable fulerum-stop is suspended from the cover through an ordinary stuffing-box, and has on its upper end n earn or circular incline, L, with llmd-leverthe adjustable stop k is lowered and Jrhe lever I drops,

thus relieving the motion of the n'ollking faces before opening the vulve. l o

Il zrving time described my invention,l .1'

"looking the l That I ola-im as new, and desire co s ecure'byLetters Patent, is v 1. The combinatiomwth the gates, O C, having sockets P l and pins 'SA S, 0f the nut mi having zl'is or trnnnions O Q, slots R E, :1nd grooves Q Q, tor gptes, su'bsrirntially as hereinbefore sel: forth.

2. 'lhe combinapion and arrangement of` the gates C G, haring ribs E AT, wit-l1 the .Ylyerase having correspondingribsUU, ,substantially is and fo'r the pnrpose herenbefore set forth.

3. `The adjustable fulorum-sto la; opemtel by the coin or cirenler incline Surface QE, andlmn flever l, snbstantally @sand Ifor-the purpose hereinbefore set forth. JQHN )RATER-SON. 

